fluroxypyr
97%,95%tech, 28.8%ec,
Herbicide
HRAC O WSSA 4; pyridinecarboxylic acid
NOMENCLATURE
fluroxypyr
Common name fluroxypyr (BSI, draft E-ISO, (m) draft F-ISO, ANSI)
IUPAC name 4-amino-3,5-dichloro-6-fluoro-2-pyridyloxyacetic acid
Chemical Abstracts name [(4-amino-3,5-dichloro-6-fluoro-2-pyridinyl)oxy]acetic acid
CAS RN [69377-81-7] Development codes Dowco 433 (Dow)
PHYSICAL CHEMISTRY
fluroxypyr
Mol. wt. 255.0 M.f. C7H5Cl2FN2O3 Form White, crystalline solid. M.p. 232-233 ºC V.p. 3.784 ´ 10-6 mPa (20 ºC, Knudsen effusion) KOW logP = -1.24 (unstated pH) Henry 1.06 ´ 10-8 Pa m3 mol-1 (calc.) S.g./density 1.09 (24 ºC) Solubility In water 91 mg/l (unspecified pH, 20 ºC). In acetone 51.0, methanol 34.6, ethyl acetate 10.6, isopropanol 9.2, dichloromethane 0.1, toluene 0.8, xylene 0.3 (all in g/l, 20 ºC). Stability Stable in acidic media. Fluroxypyr is acidic, and reacts with alkalis to form salts. DT50 in water 185 d (pH 9, 20 ºC). Stable at temperatures up to melting point. Stable in visible light. pKa 2.94
APPLICATIONS
Biochemistry Synthetic auxin (acting like indolylacetic acid). Mode of action Fluroxypyr is applied as fluroxypyr-meptyl. After predominantly foliar uptake, the ester is hydrolysed to the parent acid, which is the herbicidally active form, and translocated rapidly to other parts of the plants. Acts by inducing characteristic auxin-type responses, e.g. leaf curling. Uses Fluroxypyr is effective by post-emergence foliar application, controlling a range of economically important broad-leaved weeds (including Galium aparine) in all small grain crops, and Rumex spp. and Urtica dioica in pastures. Directed applications are used against herbaceous and woody broad-leaved weeds in orchards (apple only) and plantation crops (rubber and oilpalm), and broad-leaved brush spp. in conifer forests. Post-emergence, broadcast applications of fluroxypyr in maize up to the 6-leaf stage of the crop are used for control of Calystegia sepium, Convolvulus arvensis and Solanum nigrum. The meptyl and 2-butoxy-1-methylethyl esters have similar activity, the advantage of the latter being the wider range of formulation options that are available. Phytotoxicity Non-phytotoxic to the crops for which its use is recommended. Formulation types EC.
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product name: |
fluroxypyr 95% tech |
fluroxypyr 288g/l ec |
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a.i. content: |
95.13% |
289 |
|
water : |
0.20% |
0.05% |
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ph value: |
6.1 |
6.5 |
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acetone insoluble: |
0.10% |
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|
emulsion stability: |
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qualified |
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sg: |
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1 |
